<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>评论回车发布</title>
    <style>
        .wrapper {
            min-width: 400px;
            max-width: 800px;
            display: flex;
            justify-content: flex-end;
        }
        
        .avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            overflow: hidden;
            background: url(./images/avatar.jpg) no-repeat center / cover;
            margin-right: 20px;
        }
        
        .wrapper textarea {
            outline: none;
            border-color: transparent;
            resize: none;
            background: #f5f5f5;
            border-radius: 4px;
            flex: 1;
            padding: 10px;
            transition: all 0.5s;
            height: 30px;
        }
        
        .wrapper textarea:focus {
            border-color: #e4e4e4;
            background: #fff;
            height: 50px;
        }
        
        .wrapper button {
            background: #00aeec;
            color: #fff;
            border: none;
            border-radius: 4px;
            margin-left: 10px;
            width: 70px;
            cursor: pointer;
        }
        
        .wrapper .total {
            margin-right: 80px;
            color: #999;
            margin-top: 5px;
            opacity: 0;
            transition: all 0.5s;
        }
        
        .list {
            min-width: 400px;
            max-width: 800px;
            display: flex;
        }
        
        .list .item {
            width: 100%;
            display: flex;
        }
        
        .list .item .info {
            flex: 1;
            border-bottom: 1px dashed #e4e4e4;
            padding-bottom: 10px;
        }
        
        .list .item p {
            margin: 0;
        }
        
        .list .item .name {
            color: #FB7299;
            font-size: 14px;
            font-weight: bold;
        }
        
        .list .item .text {
            color: #333;
            padding: 10px 0;
        }
        
        .list .item .time {
            color: #999;
            font-size: 12px;
        }
    </style>
</head>

<body>
    <div class="wrapper">
        <i class="avatar"></i>
        <textarea id="tx" placeholder="发一条友善的评论" rows="2" maxlength="200"></textarea>
        <button>发布</button>
    </div>
    <div class="wrapper">
        <span class="total">0/200字</span>
    </div>
    <div class="list">
        <div class="item" style="display: none;">
            <i class="avatar"></i>
            <div class="info">
                <p class="name">清风bu来</p>
                <p class="text">大家都辛苦啦，感谢各位大大的努力，能圆满完成真是太好了[笑哭][支持]</p>
                <p class="time">2022-10-10 20:29:21</p>
            </div>
        </div>
    </div>
    <script>
        const text = document.querySelector('#tx');
        const total = document.querySelector('.total');
        const item = document.querySelector('.item');
        const main = document.querySelector('.text');

        text.addEventListener('focus', function() {
            total.style.opacity = 1
        })
        text.addEventListener('blur', function() {
            total.style.opacity = 0
        })
        text.addEventListener('input', function() {
            total.innerHTML = `${text.value.length}/200字`
        })
        text.addEventListener('keyup', function(e) {
            if (e.key === 'Enter') {
                item.style.display = 'block'
                main.innerHTML = text.value
            }
        })
    </script>
</body>

</html>